Making a Return Spring for a Aircraft Chronograph

This shows why HTI is the leader in aircraft clock restoration.  Other facilities declared this WWII Junghans clock to be irreparable because the broken return spring for the chronograph was not available as a replacement part. The part was made using the same process described for Making an Index Spring for a Wrist Chronograph .

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Below the replacement part can clearly be seen fitted to the movement.  The WWII aircraft clock is once again ready for service.